Ukraine. A group of armed men have now taken over the key government building in the regional capital of crimea and have raised the russian flag. This is raising fears that russia may step in and into ukraine. Lets go to our correspondent Barbara Starr. Right now forces are active along the border with ukraine. Is there real serious fear russia could potentially cross the line into ukraine . Well, wolf, lets get right to defense secretary chuck hagel because there is an extraordinary optic out there. Earlier today at nato headquarters in brussels secretary hagel issued a warning to moscow. And how many years has it been since a u. S. Defense secretary had to do that . I want you to listen to what he had to say. Im closely watching russias military exercises along the ukrainian border, which they announced as you know yesterday. I expect russia to be transparent about these activities. And i urge them not to take any steps that could be misinterpreted or lead to m miscalculation during a very delicate time, a time of great tension. A direct warning from the u. S. To the russian military. So what is going on along that border . Well, Russian Forces now on alert conducting those exercises. The big worry, wolf, is as they move closer to that border with ukraine, as they move around and exercise and train, if that is indeed what they are doing, they get closer to the border if, if, they were to get orders to move into ukraine. They are that much closer, they could move very quickly, u. S. Officials say, and it might be hard for u. S. Intelligence to catch the first glimpse, the first information that they were on the move. The u. S. Wants them to stay put. And they want plenty of time to engage in very, very assertive diplomacy with moscow to make sure there are no moves. Wolf. And you can underline the urgency you saw chuck hagel, the defense secretary, reading those carefully crafted remarks. Those werent off the cuff or anything. That was a deliberately approved statement that he was issuing to moscow. So what are the contingency plans . Are there contingency plans . Say russia moves troops into ukraine, what happens . The question is what would that look like . If theres 150,000 Russian Troops moving across the border in a massive movement, which the u. S. Does not expect i must say, they have no belief that thats going to happen. That really becomes a massive worldwide crisis. Not just a security crisis, but an economic crisis for the region. You could see investment and that sort of thing dry up very fast with that kind of instability. The big time to the u. S. Were told what if you get small units of Russian Troops, small incursions across the border to very select places . What if in sebastopol, things just become a little more uncertain. This drip, drip, drip of instability. The u. S. Right now we are told has no real option other than diplomacy and to use other countries also to convince moscow and convince the emerging government in ukraine not to engage in any destabilizing moves, not to take any steps that they cant move back from. Wolf. Lets see if the u. S. Or the europeans call for an urgent meeting of the United Nations security council. That would be an immediate first step if they sense something was about to happen. All right, barbara, thanks very much. This map illustrates the divide in ukraine. On the left the western side of the country people mostly speak ukrainian, on the eastern side closest to russia they mostly speak russian. Kiev as you know is the capital. And there today the parliament has chosen a new Prime Minister to lead whats called the interim government. Meanwhile we now know more about the whereabouts of the former president , Viktor Yanukovych. Heres cnns phil black. President ed Viktor Yanukovych, a man who is now a fugitive in his own country, had requested personal protection from the russian government. And the russian government had granted that protection. On the territory of the russian federation. Now russia media is saying that Viktor Yanukovych will hold a press conference in russia in the Southern City on friday. Meanwhile in the ukrainian region of crimea voted to dismiss the local administration and secondly calling for a referendum to determine if crimea should become an independent sovereign state. It is a separatist question. And one that the crimea will now apparently vote for on may 25th, the same day the nation of ukraine is scheduled to vote for its next president. Phil black, cnn, kiev. Other International News were following, an interesting new attraction in havanas harbor, a wellarmed communication and surveillance ship complete with missiles. Usually arrivals like these are highly publicized in cuba, but this one has been kept very low key. No one is talking about why this russian ship is in cuba right now. North korea flexing its muscles today by firing four, yes, four shortrange missiles from a site near the border with south korea. The missiles went into the sea of japan, also known as the east sea. The missiles can travel around 120 miles, which would easily reach deep into south korea. The timing is key here as the United States and south korea just started their own joint military exercises earlier this week. The north korea test launch is just one of several Foreign Policy issues president obamas trying to juggle right now. We just touched on russia, then theres the syria civil war, Nuclear Talks with iran, reports china is beefing up its pacific fleet. And of course afghanistan and the status of u. S. Troops in that country. Lets bring in our chief international correspondent, the anchor of amanpour. Christiane amanpour, lets start with russia, some are concerned we might be on the eve of another cold war. Youve talked about the treaty that forbids russia from getting involved in ukraine. So what if anything would stop Vladimir Putin from getting involved . Well, there doesnt seem to be any notion that he is actually going to do so though just like secretary hagel the secretary general of nato, ras mussen tweeted a similar warning to russia talking about taking every step not to have any miscalculation and warning russia not to do anything that could be misperceived. The interim authorities in ukraine have also called in the russian in kiev and they have issued him a demag about whats going on as well. Interestingly the information Barbara Starr has the u. S. Right now says it only sees russias military exercises within the normal range. It does notd see any of the kind of massive planning russia would have to do in terms of planning and logistics and securing air and land and rail and road corridors to incur into ukraine. Of course the russians are saying they will not intervene militarily. Where does this leave everybody . Still a very tense crisis in the ukraine. And what were hearing from people who have been actually mediating and certainly were at the beginning of this crisis the number one russia along with the u. S. And the uk does have a treaty not to interfere, basically respecting ukraines borders and its independence. And also the interim government is being urged to reach out to the ethnically russian parts of ukraine and to make sure that the new ukraine is one for all ukrainians including those who have russian ethnicity, including those in the crimea. So, yes, its very intense right now. But a lot of intensive diplomacy taking place along those lines to try to make sure it remains stable and this crisis doesnt spill out of control. When you think about it, christiane, ukraine a very north korea, missiles being launched, china, will u. S. Troops stay in afghanistan next year, all of these are huge, huge headaches, problems for the president of the United States. Which will you rank as the most serious right now . Well, the big problems of course were talking about an administration who does not want to intervene and is in fact pulling back from all sorts of engagements. You mentioned afghanistan. I just spoke to the former afghan form minister who is one of the main contenders for the president ial elections to succeed hamid karzai. And he says its time to repair relations with the United States. Basically referring although not directly taking a dig at his former boss, but you know the personal relations between president obama and president karzai are very poisoned. The whole idea of president karzai refusing to sign onto a security arrangement that would leave the u. S. Residual force. All the other president ial candidates in afghanistan want that residual force, all say they would sign such an agreement should either one of them be elected. The majority of the Afghan People want that residual force of u. S. , you know, personnel to stay beyond the 2014 withdrawal date. So most people think its going to happen, but again, its very much on a knife edge. If there is no residual force then begs the question could afghanistan turn into what iraq is today . Incredibly violent, incredibly unstable with civil war, you know, festering there since u. S. Pulled out all its troops couple of years ago. The other more positive thing perhaps counterintuitively thats going on is the diplomacy between iran and the United States and the other nations involved. By all accounts that still is moving to try to, you know, restrict and restrain Irans Nuclear program in return for those eventual sanctions relief and bigger deal in the future. That seems to be progressing in the way that all sides have launched it right now. Well see how that ends up as the talks get, you know, broader and deeper and more and more complicated. Yeah. Whats so depressing to me and so many others, christiane, is that after 13 years of the United States deeply involved in afghanistan deploying 150,000 troops at one point, spending hundreds of billions of dollars building up an Afghan Military and police force, you are absolutely right without the u. S. There they would crumble basically, it would deteriorate into a civil war. And its a disaster that situation. 300,000 afghan troops unable to get the job done. Its pretty depressing Hamid Karzais legacy a disaster. No doubt about that. Christiane amanpour, thanks very much. Officials in new jersey releasing texting between two key figures in whats called the bridgegate scandal. Youll hear what governor Chris Christies top aides joked about with a Port Authority. And later Hillary Clintons stepping into the spotlight in a politically critical state. Youre going to find out about her comments in florida and why theyre making news today. So there i was again, explaining my moderate to severe chronic plaque psoriasis to another new stylist. It was a total embarrassment. And not the kind of attention i wanted. So i had a serious talk with my dermatologist about my treatment options. This time, she prescribed humiraadalimumab. Humira helps to clear the surface of my skin by actually working inside my body. In clinical trials, most adults with moderate to Severe Plaque Psoriasis saw 75 skin clearance. And the majority of people were clear or almost clear in just 4 months. Humira can lower your ability to fight infections, including tuberculosis. 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In the meantime check other news were monitoring. Attorney general eric holder in a washington, d. C. Hospital right now. He was taken there earlier today after feeling faint. He also had shortness of breath. Moments ago the White House Press secretary jay carney talked about holders health in the white house briefing. Got anything to say about the attorney general being hospitalized, the president made aware . The president has been made aware. And i think the department of justice has put out a statement that as a precaution when he felt faint earlier today he was taken to Washington Medstar Hospital Center to undergo further evaluation. And he is resting comfortably and in good condition. He is alert and conversing with his doctors. The president was notified and of course wishes him a speedy recovery. As do we. Lets go to our justice reporter evan perez joining us right now. What else do we know about the attorney generals condition, evan . Well, wolf, he was in his normal morning meeting at 9 30 this morning with some of his top staff when he complain about feeling faint and shortness of breath. He excused himself of the meeting, went next door to his regular office. And thats when his fbi security detail insisted that he go to the hospital. They called an ambulance. He was taken by ambulance to washington medstar hospital. Im told by someone who was there that he was joking with some of the emts as he was being rushed to the hospital. And he is now in the hospital. Hes resting comfortably. Hes joking, talking to his doctors. So it appears whatever it was hes now in good shape. Right now we dont know exactly what caused this, just that he complained of some faintness and some shortness of breath. And hes generally was regarded as pretty good condition, not overweight, tall and seemed to be just fine. So lets hope its nothing serious. And youll continue to monitor it for us. Update us, evan, when you get more information. Lets hope hes out of the hospital fairly soon. Other news including new information thats now surfacing about the new jersey socalled bridgegate scandal. Documents have just been released revealing conversations between a former top aide to the governor of new jersey, chris christie, and the Port Authority official who ordered those notorious lane closures over at the George Washington bridge. Our investigative correspondent has been looking over these new documents just released. What are you seeing . Well, wolf, ill tell you the new information, it comes from documents weve seen before but had been previously blacked out. Today the Committee Investigating said some of the information should not have been redakted. So they released new versions of both Text Messages and emails between a number of key players. The most Interesting Exchange involves a discussion between bridget kelly, now she was the former top christie aide since fired by the governor, and david wildstein. In these texts they joke about of all things causing traffic problems. Now, wildstein sends kelly a picture of a rabbi and says he has officially ticked me off. She replies clearly cant we cause traffic problems in front of his house, can we . And he jokes flights to tel aviv all mysteriously delayed. Now, the rabbi, gentleman by the name of mendy sppz carlebach. We reached out to the rabbi, but we havent heard back. Theres also a separate exchange thats interesting. Its between wildstein and a Port Authority police officer. And that shows us that wildstein was on the bridge the first day of those lane closings. Any other telling details released in these new documents . Well, ill tell you, wolf, there was a top christie appointee to the Port Authority, bill baroni, and we see he texts wildstein at one point and asks are we being fired . That came about a month before he resigned. Were still going through all these documents and have a full report on the situation room later today. The fact theyre joking about traffic problems to tel aviv, obviously, you know, not good not looking good for these two. Thanks very much chris frates. Hillary clinton, did she drop any hints about another run to the white house . Later, a look back at frantic effort to revive obamacare. Time magazine takes a special behind the scenes look at the disastrous rollout of the website. Well speak with the reporter who broke this story. Arizona governor jan brewers getting a lot of feedback on her decision to veto a